In addition to the above info. Be sure to inquire about the actual/cash price of the medication. Don't just settle for your co-pay. In some cases, the pharmacy will charge you less if you pay out of pocket.
Example:
My co-pay is $15 for a 30 day supply...the same med at their cash price is $8 for 30 days.
I use my FSA* card to pay for the med and I'm good to go.
Download the app
GoodRx** for a great cost comparison from pharmacies in your area and compare them to your co-pay amounts.
*FSA=Flex spending account, not free shit army.
**Not affiliated with GoodRx in any way.
ETA.
As of January 1st, my insurance now requires all maintenance medications to purchased through the mail in 90 day quantities. I did my research with GoodRx and found that my local HEB would charge me $56 for all of my meds. My mail order prescription coverage would be $68
for just one of the meds.